5V Relay Shield V1.3

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The Relay Shield is an Arduino compatible smart module with 4 mechanical relays providing an easy way to control high voltage. Support 4-way 3A relay control, xbee wireless module.Independent external power supply and optocoupler isolation, effectively avoid electromagnetic interference from the accused devices.Note: Take care the pins on the Shield should not be touched with USB connector of Arduino UNO when they are connected.Features: